US PATENT SUBCLASS 218 / 83
.~.~ Recirculating systems

Current as of: June, 1999
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218 /   HD   HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES

1  DF  ARC PREVENTING OR EXTINGUISHING DEVICES {14}
43  DF  .~ Air-current blowout {18}
83.~.~ Recirculating systems

DEFINITION

Classification: 218/83

Recirculating systems:

(under subclass 43) Subject matter comprising a high-pressure compressed air enclosure and a low-pressure air vessel and compressor means compressing air taken from the low-pressure vessel to supply compressed gas to the high-pressure enclosure.